2143823551 has 2 divisors, whose sum is σ = 2143823552. Its totient is φ = 2143823550.

The previous prime is 2143823543. The next prime is 2143823567. The reversal of 2143823551 is 1553283412.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2143823551 - 2³ = 2143823543 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2143823531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1071911775 + 1071911776.

It is an arithmetic number, because the mean of its divisors is an integer number (1071911776).

Almost surely, 2^2143823551 is an apocalyptic number.

2143823551 is a deficient number, since it is larger than the sum of its proper divisors (1).

2143823551 is an equidigital number, since it uses as much as digits as its factorization.

2143823551 is an evil number, because the sum of its binary digits is even.

The product of its digits is 28800, while the sum is 34.

The square root of 2143823551 is about 46301.4422129592. The cubic root of 2143823551 is about 1289.4257707066.

The spelling of 2143823551 in words is "two billion, one hundred forty-three million, eight hundred twenty-three thousand, five hundred fifty-one".